Matern care for abnlt of fetl hrt rate or rhym, 1st tri, oth

This code signifies a pregnant patient in her first trimester receiving medical attention due to an irregular or abnormal heart rate or rhythm detected in one of her fetuses, when the pregnancy involves multiple gestations and the specific fetus is not identified. This indicates the mother is undergoing monitoring or intervention for a fetal cardiac anomaly.

Use this code when the medical record documents maternal care for a fetal heart rate or rhythm abnormality during the first trimester of a multiple gestation pregnancy, and the specific fetus affected is not specified. Documentation should clearly indicate the trimester, the nature of the fetal cardiac issue, and that it's maternal care for this condition.

• Ensure the documentation specifies "first trimester" and "other fetus" (or unspecified fetus in a multiple gestation).
• Do not use this code if the specific fetus (e.g., Fetus 1, Fetus 2) is identified; instead, use the appropriate O36.831- subcategory.
• Sequence this code as a primary diagnosis when the maternal care for the fetal cardiac abnormality is the reason for the encounter.